We started in Bangkok
We made sure that we bought the tickets a day in advance, but that was still cutting it close. The travel agent had to call to make sure that there where tickets available.
It would probably be better to get the tickets a few days in advance, essentially if it it Full Moon Party season. We chose to take the Lomprayah bus and speed boat. It is the most expensive choice, but also the most comfortable.
Since it was high season, in other words, the days before the Full Moon Party, we had to pay extra. About 1550 Baht per person. It could have been a lot cheaper if we had taken the government train and the normal ferry. But that would also have taken a lot longer. Think around 22 hours with transfers and such, instead of the 11 hour bus trip we had.
We took the night bus, which was delayed by 1½ hours, with minimal information from Lompraya, just saying “The Bus will be here soon, maybe 30 min.” I knew it could take some time and perhaps they didn’t know themselves. But, I knew we could get some food and drink and just find a good spot to wait.